sugar-toolkit-gtk3/services/nm/nminfo.py

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# vi: ts=4 ai noet
#
# Copyright (C) 2006, Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import dbus
import dbus.service
import time
import os
import binascii
import ConfigParser
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import logging
import nmclient
try:
from sugar import env
except ImportError:
pass
NM_INFO_IFACE='org.freedesktop.NetworkManagerInfo'
NM_INFO_PATH='/org/freedesktop/NetworkManagerInfo'
class NoNetworks(dbus.DBusException):
def __init__(self):
dbus.DBusException.__init__(self)
self._dbus_error_name = NM_INFO_IFACE + '.NoNetworks'
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class CanceledKeyRequestError(dbus.DBusException):
def __init__(self):
dbus.DBusException.__init__(self)
self._dbus_error_name = NM_INFO_IFACE + '.CanceledError'
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class NetworkInvalidError(Exception):
pass
class NMConfig(ConfigParser.ConfigParser):
def get_bool(self, section, name):
opt = self.get(section, name)
if type(opt) == type(""):
if opt.lower() == 'yes' or opt.lower() == 'true':
return True
elif opt.lower() == 'no' or opt.lower() == 'false':
return False
raise ValueError("Invalid format for %s/%s. Should be one of [yes, no, true, false]." % (section, name))
def get_list(self, section, name):
opt = self.get(section, name)
if type(opt) == type(""):
if not len(opt):
return []
try:
return opt.split()
except Exception:
pass
raise ValueError("Invalid format for %s/%s. Should be a space-separate list." % (section, name))
def get_int(self, section, name):
opt = self.get(section, name)
try:
return int(opt)
except Exception:
pass
raise ValueError("Invalid format for %s/%s. Should be a valid integer." % (section, name))
def get_float(self, section, name):
opt = self.get(section, name)
try:
return float(opt)
except Exception:
pass
raise ValueError("Invalid format for %s/%s. Should be a valid float." % (section, name))
IW_AUTH_CIPHER_NONE = 0x00000001
IW_AUTH_CIPHER_WEP40 = 0x00000002
IW_AUTH_CIPHER_TKIP = 0x00000004
IW_AUTH_CIPHER_CCMP = 0x00000008
IW_AUTH_CIPHER_WEP104 = 0x00000010
IW_AUTH_ALG_OPEN_SYSTEM = 0x00000001
IW_AUTH_ALG_SHARED_KEY = 0x00000002
NETWORK_TYPE_UNKNOWN = 0
NETWORK_TYPE_ALLOWED = 1
NETWORK_TYPE_INVALID = 2
class Security(object):
def __init__(self, we_cipher):
self._we_cipher = we_cipher
def read_from_config(self, cfg, name):
pass
def read_from_args(self, args):
pass
def new_from_config(cfg, name):
security = None
try:
we_cipher = cfg.get_int(name, "we_cipher")
if we_cipher == IW_AUTH_CIPHER_NONE:
security = Security(we_cipher)
elif we_cipher == IW_AUTH_CIPHER_WEP40 or we_cipher == IW_AUTH_CIPHER_WEP104:
security = WEPSecurity(we_cipher)
else:
# FIXME: find a way to make WPA config option matrix not
# make you want to throw up
raise ValueError("Unsupported security combo")
security.read_from_config(cfg, name)
except (ConfigParser.NoOptionError, ValueError), e:
return None
return security
new_from_config = staticmethod(new_from_config)
def new_from_args(we_cipher, args):
security = None
try:
if we_cipher == IW_AUTH_CIPHER_NONE:
security = Security(we_cipher)
elif we_cipher == IW_AUTH_CIPHER_WEP40 or we_cipher == IW_AUTH_CIPHER_WEP104:
security = WEPSecurity(we_cipher)
else:
# FIXME: find a way to make WPA config option matrix not
# make you want to throw up
raise ValueError("Unsupported security combo")
security.read_from_args(args)
except ValueError, e:
logging.debug("Error reading security information: %s" % e)
del security
return None
return security
new_from_args = staticmethod(new_from_args)
def get_properties(self):
return [dbus.Int32(self._we_cipher)]
def write_to_config(self, section, config):
config.set(section, "we_cipher", self._we_cipher)
class WEPSecurity(Security):
def read_from_args(self, args):
if len(args) != 2:
raise ValueError("not enough arguments")
key = args[0]
auth_alg = args[1]
if isinstance(key, unicode):
key = key.encode()
if not isinstance(key, str):
raise ValueError("wrong argument type for key")
if not isinstance(auth_alg, int):
raise ValueError("wrong argument type for auth_alg")
self._key = key
self._auth_alg = auth_alg
def read_from_config(self, cfg, name):
# Key should be a hex encoded string
self._key = cfg.get(name, "key")
if self._we_cipher == IW_AUTH_CIPHER_WEP40 and len(self._key) != 10:
raise ValueError("Key length not right for 40-bit WEP")
if self._we_cipher == IW_AUTH_CIPHER_WEP104 and len(self._key) != 26:
raise ValueError("Key length not right for 104-bit WEP")
try:
a = binascii.a2b_hex(self._key)
except TypeError:
raise ValueError("Key was not a hexadecimal string.")
self._auth_alg = cfg.get_int(name, "auth_alg")
if self._auth_alg != IW_AUTH_ALG_OPEN_SYSTEM and self._auth_alg != IW_AUTH_ALG_SHARED_KEY:
raise ValueError("Invalid authentication algorithm %d" % self._auth_alg)
def get_properties(self):
args = Security.get_properties(self)
args.append(dbus.String(self._key))
args.append(dbus.Int32(self._auth_alg))
return args
def write_to_config(self, section, config):
Security.write_to_config(self, section, config)
config.set(section, "key", self._key)
config.set(section, "auth_alg", self._auth_alg)
class Network:
def __init__(self, ssid):
self.ssid = ssid
self.timestamp = int(time.time())
self.bssids = []
self.we_cipher = 0
self._security = None
def get_properties(self):
bssid_list = dbus.Array([], signature="s")
for item in self.bssids:
bssid_list.append(dbus.String(item))
args = [dbus.String(self.ssid), dbus.Int32(self.timestamp), dbus.Boolean(True), bssid_list]
args += self._security.get_properties()
return tuple(args)
def get_security(self):
return self._security.get_properties()
def set_security(self, security):
self._security = security
def read_from_args(self, auto, bssid, we_cipher, args):
if auto == False:
self.timestamp = int(time.time())
if not bssid in self.bssids:
self.bssids.append(bssid)
self._security = Security.new_from_args(we_cipher, args)
if not self._security:
raise NetworkInvalidError("Invalid security information")
def read_from_config(self, config):
try:
self.timestamp = config.get_int(self.ssid, "timestamp")
except (ConfigParser.NoOptionError, ValueError), e:
raise NetworkInvalidError(e)
self._security = Security.new_from_config(config, self.ssid)
if not self._security:
raise NetworkInvalidError(e)
# The following don't need to be present
try:
self.bssids = config.get_list(self.ssid, "bssids")
except (ConfigParser.NoOptionError, ValueError), e:
pass
def write_to_config(self, config):
try:
config.add_section(self.ssid)
config.set(self.ssid, "timestamp", self.timestamp)
if len(self.bssids) > 0:
opt = " "
opt.join(self.bssids)
config.set(self.ssid, "bssids", opt)
self._security.write_to_config(self.ssid, config)
except Exception, e:
logging.debug("Error writing '%s': %s" % (self.ssid, e))
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class NotFoundError(dbus.DBusException):
pass
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class UnsupportedError(dbus.DBusException):
pass
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class NMInfoDBusServiceHelper(dbus.service.Object):
def __init__(self, parent):
self._parent = parent
bus = dbus.SystemBus()
# If NMI is already around, don't grab the NMI service
bus_object = bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus')
name = None
try:
name = bus_object.GetNameOwner("org.freedesktop.NetworkManagerInfo", \
dbus_interface='org.freedesktop.DBus')
except dbus.DBusException:
pass
if name:
logging.debug("NMI service already owned by %s, won't claim it." % name)
raise RuntimeError
bus_name = dbus.service.BusName(NM_INFO_IFACE, bus=bus)
dbus.service.Object.__init__(self, bus_name, NM_INFO_PATH)
@dbus.service.method(NM_INFO_IFACE, in_signature='i', out_signature='as')
def getNetworks(self, net_type):
ssids = self._parent.get_networks(net_type)
if len(ssids) > 0:
return dbus.Array(ssids)
raise NoNetworks()
@dbus.service.method(NM_INFO_IFACE, in_signature='si', async_callbacks=('async_cb', 'async_err_cb'))
def getNetworkProperties(self, ssid, net_type, async_cb, async_err_cb):
self._parent.get_network_properties(ssid, net_type, async_cb, async_err_cb)
@dbus.service.method(NM_INFO_IFACE)
def updateNetworkInfo(self, ssid, bauto, bssid, cipher, *args):
self._parent.update_network_info(ssid, bauto, bssid, cipher, args)
@dbus.service.method(NM_INFO_IFACE, async_callbacks=('async_cb', 'async_err_cb'))
def getKeyForNetwork(self, dev_path, net_path, ssid, attempt, new_key, async_cb, async_err_cb):
self._parent.get_key_for_network(dev_path, net_path, ssid,
attempt, new_key, async_cb, async_err_cb)
@dbus.service.method(NM_INFO_IFACE)
def cancelGetKeyForNetwork(self):
self._parent.cancel_get_key_for_network()
class NMInfo(object):
def __init__(self, client):
try:
profile_path = env.get_profile_path()
except NameError:
home = os.path.expanduser("~")
profile_path = os.path.join(home, ".sugar", "default")
self._cfg_file = os.path.join(profile_path, "nm", "networks.cfg")
self._nmclient = client
self._allowed_networks = self._read_config()
self._dbus_helper = NMInfoDBusServiceHelper(self)
def save_config(self):
self._write_config(self._allowed_networks)
def _read_config(self):
if not os.path.exists(os.path.dirname(self._cfg_file)):
os.makedirs(os.path.dirname(self._cfg_file), 0755)
if not os.path.exists(self._cfg_file):
self._write_config({})
return {}
config = NMConfig()
config.read(self._cfg_file)
networks = {}
for name in config.sections():
if not isinstance(name, unicode):
name = unicode(name)
net = Network(name)
try:
net.read_from_config(config)
networks[name] = net
except NetworkInvalidError, e:
logging.debug("Error: invalid stored network config: %s" % e)
del net
del config
return networks
def _write_config(self, networks):
fp = open(self._cfg_file, 'w')
config = NMConfig()
for net in networks.values():
net.write_to_config(config)
config.write(fp)
fp.close()
del config
def get_networks(self, net_type):
if net_type != NETWORK_TYPE_ALLOWED:
raise ValueError("Bad network type")
nets = []
for net in self._allowed_networks.values():
nets.append(net.ssid)
logging.debug("Returning networks: %s" % nets)
return nets
def get_network_properties(self, ssid, net_type, async_cb, async_err_cb):
if not isinstance(ssid, unicode):
async_err_cb(ValueError("Invalid arguments; ssid must be unicode."))
if net_type != NETWORK_TYPE_ALLOWED:
async_err_cb(ValueError("Bad network type"))
if not self._allowed_networks.has_key(ssid):
async_err_cb(NotFoundError("Network '%s' not found." % ssid))
network = self._allowed_networks[ssid]
props = network.get_properties()
# DBus workaround: the normal method return handler wraps
# the returned arguments in a tuple and then converts that to a
# struct, but NetworkManager expects a plain list of arguments.
# It turns out that the async callback method return code _doesn't_
# wrap the returned arguments in a tuple, so as a workaround use
# the async callback stuff here even though we're not doing it
# asynchronously.
async_cb(*props)
def update_network_info(self, ssid, auto, bssid, we_cipher, args):
if not isinstance(ssid, unicode):
raise ValueError("Invalid arguments; ssid must be unicode.")
if self._allowed_networks.has_key(ssid):
del self._allowed_networks[ssid]
net = Network(ssid)
try:
net.read_from_args(auto, bssid, we_cipher, args)
logging.debug("Updated network information for '%s'." % ssid)
self._allowed_networks[ssid] = net
self.save_config()
except NetworkInvalidError, e:
logging.debug("Error updating network information: %s" % e)
del net
def get_key_for_network(self, dev_op, net_op, ssid, attempt, new_key, async_cb, async_err_cb):
if not isinstance(ssid, unicode):
raise ValueError("Invalid arguments; ssid must be unicode.")
if self._allowed_networks.has_key(ssid) and not new_key:
# We've got the info already
net = self._allowed_networks[ssid]
async_cb(tuple(net.get_security()))
return
# Otherwise, ask the user for it
net = None
dev = self._nmclient.get_device(dev_op)
if not dev:
async_err_cb(NotFoundError("Device was unknown."))
return
if dev.get_type() == nmclient.DEVICE_TYPE_802_3_ETHERNET:
# We don't support wired 802.1x yet...
async_err_cb(UnsupportedError("Device type is unsupported by NMI."))
return
net = dev.get_network(net_op)
if not net:
async_err_cb(NotFoundError("Network was unknown."))
return
self._nmclient.get_key_for_network(net, async_cb, async_err_cb)
def get_key_for_network_cb(self, net, key, auth_alg, async_cb, async_err_cb, canceled=False):
"""
Called by the NMClient when the Wireless Network Key dialog
is closed.
"""
if canceled:
e = CanceledKeyRequestError("Request was canceled.")
# key dialog dialog was canceled; send the error back to NM
async_err_cb(e)
return
if not key or not auth_alg:
# no key returned, *** BUG ***; the key dialog
# should always return either a key + auth_alg, or a
#cancel error
raise RuntimeError("No key or auth alg given! Bug!")
we_cipher = None
if len(key) == 26:
we_cipher = IW_AUTH_CIPHER_WEP104
elif len(key) == 10:
we_cipher = IW_AUTH_CIPHER_WEP40
else:
raise RuntimeError("Invalid key length!")
# Stuff the returned key and auth algorithm into a security object
# and return it to NetworkManager
sec = Security.new_from_args(we_cipher, (key, auth_alg))
if not sec:
raise RuntimeError("Invalid security arguments.")
props = sec.get_properties()
a = tuple(props)
async_cb(*a)
def cancel_get_key_for_network(self):
# Tell the NMClient to close the key request dialog
self._nmclient.cancel_get_key_for_network()